Challenge ??

This story is not about Islam, but it surely is about why we shouldn't challenge people about their God actually existing or not! 
This story took place in the year 2007. A religious man who was building a mosque in Indonesia for the ease of Muslims to pray was challenged to show that God (Allah) existed by Him showing some kind of help in building the mosque. 
That night when the man slept, in his dreams visited the Prophet (P.B.U.H), and told the man to put a white piece of cloth on the top part of one of the pillars which was ready but was still not up at top of the mosques pillar. As told by the Prophet (P.B.U.H), the man put a piece of white silk cloth on top of the ready part of the pillar. Soon the part of the pillar was witnessed in mid air by almost all the eyes who owned  a habitat in that area. 
To witness this scene by yourself, click here! This is no joke or editing! 
Again I would like to say that this is not about Islam, but it is about why we shouldn't challenge each other regarding their religions and/or their God(s). 
Thank You,